Journal
GRANULAR MATTER
Volume 7, Issue 2-3, Pages 109-118Publisher
SPRINGER
DOI: 10.1007/s10035-004-0186-6
Keywords
shakedown; ratcheting; unbound granular material; simulation; resilient behavior
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Compacted unbounded granular materials are extensively used as sub-layer in pavement design. Most pavement design guides assume that they are responsible for the degradation and deformation of the roads and railways that they support. Biaxial tests are usually employed to investigate the elasto-plastic response of these materials to cyclic loading. A particularly interesting question is whether a limit load exists, below which the excitations shake down, in the sense that the material does not accumulate further deformations. We have carried out a detailed study of the elasto-plastic behavior of a simple model of unbound granular matter submitted to cyclic loading. The dissipated energy throughout the simulation has been used for the characterization of the different regimes of responses.
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